CVE-2011-1275: Microsoft Excel

High severity, CVSS 9.3. EPSS: 13.3% chance of exploitation in the next 30 days.

Microsoft Excel 2002 SP3; Office 2004, 2008, and 2011 for Mac; and Open XML File Format Converter for Mac do not properly validate record information during parsing of Excel spreadsheets, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted spreadsheet, aka "Excel Memory Heap Overwrite Vulnerability."

Affected products

• Microsoft Excel: version 2002 only
• Microsoft Office: version 2004 only; version 2008 only; version 2011 only
• Microsoft Open XML File Format Converter: any version

Published 2011-06-16. Last modified 2026-06-16.